Price is $20 + $10 to ship in cont. USA. If you are to buy it anywhere else this would be $55. 
One of the best speaker wire in the industry, highly rated. 
Belden 5T00UP 10 AWG 2-conductor wire. Its finely-stranded pure copper conductors and heavy-duty PVC jacket construction mean that 5T00UP is an excellent cable solution for all types of commercial and home audio systems.
Specifications: • Conductors: (2) 10 AWG bare copper, 65x28 stranding • Insulation material: PVC • Jacket color: Gray
 • Jacket material: PVC  • RoHS compliant: Yes  • Temperature rating: 75° C • Voltage rating: 300V RMS • Overall diameter: 0.356".
Highlights
CL3 rated commercial audio speaker cable
Extremely flexible high strand count copper conductors
High strand count also provides maximum "skin effect" and energy transfer